I have Dell Optiplex GX620. When I tried to install windows xp pro. on my p.c i got BSOD(blue screen of death) telling me that there is a hardware problem and remove any newly installed hardware. But when i tried the same u.s.b on another p.c of compaq, windows installed successfully. Can anyone tell me how can i install windows xp on my p.c with the help of u.s.b?? Sorry for bad English...... :-)